Power-transmitter.



PATENTED APR; 19, 1904.

J. GO ATES. POWER TRANSMITTER.

APPLICATION FILED 001218. 1902.

no MODEL.

QAHDHJEYS me uoxms PETEWS m. wmouma. wAsHxhr-(ou n c iatented Apr-i119, 1904.

PATENT OFFICE.

' JOHN COATES, or YHEMET," CALIFORNIA.

POWER-TRANSMITTER.

SPECIFICATION forming part of Letters Patent No. 757,599, dated. April 19, 1904.

' Application filed October 18, 1902. Serial No. 127,881. (No model.)

To all whom it may concern:

Be it known that I, J OHN COATES, a citizen of the United States, residing at Hemet, in the county of Riverside and State of California, have invented a new and useful Power-Transmitter, of which the following is a specification.

This invention relates to devices for transmitting power and for incidentally converting rotary into reciprocatory motion; and it has for its objects to provide a device of this class which, while especially designed for the purpose of transmitting motion from a windwheel shaft to the pitman or pump rod, shall be equally useful inother classes of machinery where a corresponding transmission and conversion of motion shall be required.

My invention consists in certain improvements in the construction and arrangement of larly pointed out in the claims:

With a View of furthering a better understanding of my invention I have herein shown the same arranged for operation in connection with a windmill, as will be seen by reference to the accompanying drawings, in

which- A Figure 1 is a side elevation showing a portion of a windmill to which my invention has been applied. Fig. 2 is a sectional elevation, taken on the line 2 2 of Fig. 1, on an enlarged scale. Fig. 3 is an enlarged sectional detail view. Fig. 4 is a top plan view of as much of the device as appears in Fig. 2. Fig. 5 is asectional elevation similar to Fig. .2 and illustrating a modification.

Corresponding parts in the several figures are indicated by similar characters of reference.

l'designates the upper end of a windmilltower having a turn-table 2, which supportsa forked frame 3, having a downward tubular extension 4, supported revolubly on the turntable in the usual manner. The arms 5 and 6 of the forked frame are provided near their upper ends with bearings for the shaft 7 of the wind-wheel 8, which is mounted in the usual manner at what I shall call the front end of said shaft and which may be of any desired construction.

The arms orstandards 5 and 6 of the forked frame may be disposed at any desired distance apart. Usually and preferably they will be disposed close together, the distance between gated frame 12, inclosing the pinion 9 upon shaft 7. This frame may be disposed to one side of the axial line of the pitman-rod, or it may be simply in the nature of a slot of suflicient dimensions formed at the upper end of the pitman-rod. The former construction has been illustrated in Fig. 2 and the latter in Fig. 5 of the drawings; butIdesire it to beunderstood that the disposition of the frame, as well as its general construction, may be changed at will within the scope of my invention. The frame 12 is provided on its inner side with teeth or cogs 13, forming what may be termed an endless rack. These cogs, as well as those of the pinion or cog-wheel 9, are provided with slightly-indented sides 14, the distance between the heads of adjoining cogs of the rack being necessarily sufiicient to admit between them the heads of the cogs upon the pinion. It isfllikewise obviously necessary that at the ends of the rack the cogs must be spaced farther apart than the cogs which are located at the sides of the rack in order that the device may work freely when the rack arrives at the upper and lower limits of its movement. It will be seen that by slightly indenting the sides of the cogs, as shown and described, the free operation of the device will be in no wise interfered with. At the same time the cogs upon the sides of the rack and those of the pinion will during operation be interlocked in the sense that strain exerted in a lateral direction will not be liable to separate them. It is true that provision has been made for preventing exertion at any time of such lateral strain; but the improved construction of the cogs as herein described serves as an additional safeguard. The relative sizes of the pinion and the rack-frame are such that the pinion shall be capable of engaging only one side of the rack-frame at any one time.

The sides of frame 12 are included between the flanges 10 of the pinion or cog-wheel 9, so as to prevent the parts from being-displaced lingitudinally with relation to the windmills aft.

The frame 12 carries at one side thereof a rearwardly-extending bracket 16, provided with shoulders 17 and 18, near the upper and lower ends thereof. The rear arm 6 of the fork which supports the shaft 7 has a lateral extension 19, from which a pin 20 extends in a forward direction to engage either side of the bracket 16, projecting from the frame 12. This pin 20 serves by engaging the said bracket to hold either side of the rack in engagement with the pinion 9, as will be readily understood.

In operation when the pitman or pump rod to which motion is transmitted by the pinion 9, engaging the rack-frame 12, reaches either limit of its stroke the rack will follow the pinion until its opposite side is in engagement with the latter. At the same time the pin 20 will pass over one of the shoulders 17 or 18 of the guide-bracket 16, which will thus be transferred to the opposite side of said pin to that which it previously occupied, thus holding the rack in engagement with the pinion on the reverse stroke. While it is true that the pin thus serves to guide the rack-frame, it is also true that excessive strain upon the said pin and the bracket engaged thereby is entirely avoided, owing to the peculiar shape of the teeth of the rack and pinion, which will so engage each other that lateral displacement would be practically impossible. While the pitman is between the limits of its stroke the teeth will practically serve to hold the parts in mesh. I have found that it is only at the ends, and more particularly at the lower end of the rack-frame, or, in other words, at the upper end of the stroke of the pitman, that the said guide-pin 20 and the coacting bracket 16 are really indispensable.

A vane 25 of ordinary construction is supported upon the rear standard 6 of the forked frame. This will balance the weight of the wind-wheel and will thus enable the device to turn to the wind with less frictional resistance than would be the case in the absence of such counterweight.

I have in the foregoing described the preferred construction of my invention; but I desire it to be understood that I do not limit myself as regards the structural details, but reserve the right to any modifications which may be resorted to within the scope of my invention and without detracting from the utility of the same. Be it specially understood that I do not limit the application of my invention to power transmission in windmills, but intend to use the same in all kinds of machinery where this form of transmission of power may be found available and useful.

Having thus fully described the invention, what I claim is- 1. In a device for the transmission of power a driven shaft, a pinion upon said shaft having teeth provided with slightly-indented sides, a frame inclosing said pinion and provided with interiorly-disposed teeth adapted for engagement with the teeth of the pinion, the teeth upon the sides of the frame having slightlyindented sides.

2. In a device for the transmission of power, adriven shaft, apinion upon said shaft provided at its ends with peripheral flanges, a frame inclosed between said flanges and inclosing the pinion, cogs disposed interiorly upon said frame and forming an endless rack engaging the pinion the teeth of the sides of the rack and those of the pinion being provided with slightly indented sides, and auxiliary means for supporting either side of the rack in engagement with said pinion.

3. In a device for the transmission of power a driven shaft, a pinion upon said shaft, a pitman having an elongated frame with interiorly-disposed teeth engaging said pinion the teeth upon the sides of the frame and those of the pinion being provided with slightly-indented sides, a shouldered bracket extending rearwardly from one side of the frame, a supporting-frame for the driven shaft having one of its side members laterally extended, and a pin secured to said extension and engaging the shouldered bracket of the reciprocatory frame.

In testimony that I claim the foregoing as my own I have hereto aflixed my signature in the presence of two witnesses.

JOHN COATES.

Witnesses:

P. N. MYERS, W. C. HOSKING. 

